﻿package com.foed.animation.easing {

	public class Quart {

		static public function easeIn (t:Number, b:Number, c:Number, d:Number):Number {
			return c*(t/=d)*t*t*t + b;
		}

		static public function easeOut (t:Number, b:Number, c:Number, d:Number):Number {
			return -c * ((t=t/d-1)*t*t*t - 1) + b;
		}

		static public function easeInOut (t:Number, b:Number, c:Number, d:Number):Number {
			if ((t/=d/2) < 1) return c/2*t*t*t*t + b;
			return -c/2 * ((t-=2)*t*t*t - 2) + b;
		}

	}

}